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Method for preparing vinyl chloride through reaction of acetylene and hydrogen chloride

A technology of acetylene hydrochlorination and hydrogen chloride, which is applied in the addition preparation of hydrogen halide, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problem of no industrialization, catalyst activity stability cannot meet industrialization requirements, and catalyst catalytic reaction activity is improved. limited issues

Pending Publication Date: 2022-06-03
SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many research reports have been made on the development of non-precious metal mercury-free catalysts at home and abroad, but there is still no real industrialization so far.
The main problem is that the activity and stability of the catalyst cannot meet the requirements of industrialization, and there is still a gap in the catalytic performance of the mercuric chloride catalyst.
China Patent CN 103007972 A, CN 103272619 A, CN 105126878 B, CN102069000 A, CN 102430418 A, CN 101670293A, CN 101497046A, CN 109529893 A, CN 102125830 B, CN 1026988066 , covering the screening of catalytic promoters and coordination molecules, which can improve the stability of the catalyst to a certain extent, but the improvement of the catalytic activity of the catalyst is very limited

Method used

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  • Method for preparing vinyl chloride through reaction of acetylene and hydrogen chloride
  • Method for preparing vinyl chloride through reaction of acetylene and hydrogen chloride
  • Method for preparing vinyl chloride through reaction of acetylene and hydrogen chloride

Examples

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Effect test

preparation example

[0098] The following Examples 1-9 relate to the preparation of non-precious metal composite catalysts, unless otherwise specified, the main implementation steps include:

[0099] (1) subjecting the catalyst carrier to pretreatment under certain conditions to obtain a pretreated catalyst carrier;

[0100] (2) modifying the catalyst carrier treated in step (1) under certain conditions to regulate the surface groups of the carrier and improve the dispersion and fixation of the catalytically active components;

[0101] (3) preparing the catalytic active component metal salt solution in turn; the catalytic metal salt solution; the alkali metal salt solution; the rare earth metal salt solution; the coordination compound solution;

[0102] (4) mixing and impregnating the modified catalyst carrier in step (2) with each group of solutions obtained in step (3);

[0103] (5) The impregnated sample is dried and calcined to obtain a non-mercury catalyst for catalyzing the hydrochlorinatio...

Embodiment 1

[0105] (1) Weigh 10 g of 40-mesh activated carbon, pretreat it with 2N hydrochloric acid solution at 60°C for 4 hours, then wash with deionized water until pH is neutral, and then dry at 100°C for 10 hours before use.

[0106] (2) Mix the pretreated activated carbon with 2N nitric acid and ammonium chloride solution, control the mass ratio of nitrogen atom to activated carbon at 1:10, ultrasonically impregnate it at 50KHZ for 2 hours, and dry it at 110°C for 12 hours after ultrasonic impregnation. After 1 hour, it was placed in a tube furnace and calcined for 2 hours in a nitrogen atmosphere to obtain the modified activated carbon.

[0107] (3) Weigh MnCl 3 and PbCl 4 Mixture, control quality and activated carbon ratio at 1:10, add water to dissolve to obtain solution I; weigh appropriate amount of LiCl and LaCl 3 Control its mass ratio to activated carbon to 1:20, add water to dissolve to obtain solution II; weigh an appropriate amount of triethyl phosphite, control its mas...

Embodiment 2

[0111] (1) Weigh 10 g of 40-purpose activated carbon, pre-treat it with 2N nitric acid solution at 80°C for 3 hours, then wash with deionized water to neutral pH, then dry at 120°C for 5 hours for later use;

[0112] (2) Mix the pretreated activated carbon with acrylamide and ammonium sulfate solution, control the mass ratio of nitrogen and sulfur atoms to the activated carbon mass at 1:5, ultrasonically impregnate it at 70KHZ for 4 hours, and dry it at 130°C after ultrasonic impregnation. After 8 hours, it was placed in a tube furnace, and calcined under nitrogen atmosphere for 2 hours to obtain modified activated carbon;

[0113] (3) Weigh TiCl 3 and IrCl 3 Mixture, control quality and activated carbon ratio at 1:20, add water to dissolve to obtain solution I; weigh an appropriate amount of BaCl 2 and LaCl 3 Control its mass ratio to activated carbon to 1:30, add water to dissolve to obtain solution II; weigh an appropriate amount of triphenylphosphorus, control its mass ...

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Abstract

The invention provides a method for preparing vinyl chloride through a reaction of acetylene and hydrogen chloride, and particularly provides a method for preparing vinyl chloride through acetylene and hydrogen chloride, which comprises the following steps: filling a fixed bed reaction tube with a catalyst, enabling acetylene and hydrogen chloride to pass through the reaction tube, thus, the reaction is performed; wherein the catalyst is prepared by dipping a catalyst carrier in a metal salt solution, a co-catalysis metal salt solution (including an alkali metal salt solution or a rare earth metal salt solution) and a coordination compound solution.

Description

technical field [0001] The present invention relates to the field of vinyl chloride, and specifically, the present invention provides a method for preparing vinyl chloride by reacting acetylene and hydrogen chloride. Background technique [0002] Vinyl chloride is a very important chemical raw material, mainly used for the production of polyvinyl chloride resin (PVC). As of 2016, the world's PVC production has reached 40 million tons. my country is the world's largest PVC producer, with an output of 25 million tons. The market demand is still growing at a rate of 5% every year. At present, the industrialized vinyl chloride monomer production technologies include acetylene hydrochlorination process and ethylene oxychlorination process. Since my country is a country rich in coal and poor in oil, the production of vinyl chloride in my country mainly adopts the acetylene hydrochlorination process, accounting for the proportion of vinyl chloride in my country. 70-80% of the produ...

Claims

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Application Information

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IPC IPC(8): C07C21/06C07C17/08B01J23/34B01J23/63B01J23/18B01J23/83B01J23/847B01J37/02B01J37/34
CPCC07C17/08B01J23/34B01J23/63B01J23/18B01J23/83B01J23/8472B01J23/002B01J37/0205B01J37/0213B01J37/343B01J2523/00C07C21/06B01J2523/11B01J2523/3706B01J2523/44B01J2523/72B01J2523/25B01J2523/47B01J2523/827B01J2523/24B01J2523/3712B01J2523/3743B01J2523/54B01J2523/17B01J2523/23B01J2523/3718B01J2523/39B01J2523/13B01J2523/15B01J2523/55Y02P20/584
Inventor 姜标沈兆兵邢萍秦叶军
Owner SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
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